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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 299 | * Filters the HTML content for navigation menus. |
| 300 | * |
| 301 | * @since 3.0.0 |
| 302 | * |
| 303 | * @see wp_nav_menu() |
| 304 | * |
| 305 | * @param string $nav_menu The HTML content for the navigation menu. |
| 306 | * @param stdClass $args An object containing wp_nav_menu() arguments. |
| 307 | */ |
| 308 | $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args ); |
| 309 | |
| 310 | if ( $args->echo ) { |
| 311 | echo $nav_menu; |
| 312 | } else { |
| 313 | return $nav_menu; |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /** |